AVCONV Cam/Audio recording (Pulseaudio)

Here is a fast and easy way to record your videos using pulseaudio.

ffmpeg -f alsa -i pulse -ac 2 -acodec pcm_s16le -f video4linux2 -s 640x480 -r 30 -i /dev/video0 -threads 0 -vcodec libx264 -vpre lossless_ultrafast test.mkv
avconv -f alsa -i pulse -acodec pcm_s16le -f video4linux2 -s 640x480 -r 30 -i /dev/video0 -threads 0 -vcodec libx264 -preset ultrafast test.mkv

For this to work, you need to have your ffmpeg compiled with libx264 support. Debian users can either compile it or just use the multimedia repository.

Finding the installation date for a linux machine.

A good way to find the installation date of a linux machine is by using the passwd command with the -S option. This option displays account status information. The status information consists of 7 fields according to “man passwd”. The third field gives the date of the last password change. So, by finding the date of the users who never changed their password we can easily assume the installation date.
These users can be system users like, sys, bin, daemon etc.
example:

# passwd -S sys
11/11/2009 0 99999 7 -1
# passwd -S daemon
daemon L 11/11/2009 0 99999 7 -1
# passwd -S bin
bin L 11/11/2009 0 99999 7 -1